Allow parallel access to Oracle database

Author: FObermaier

test/NetTopologySuite.IO.Oracle.Test/IntegrationTest.cs

@@ -14,7 +14,6 @@ namespace NetTopologySuite.IO.Oracle.Connection.Test
     [TestFixture]
     public class IntegrationTest
     {
-        private const string testTableName = "NTS_TEST_GEO_DATA";
         private string _connectionString;
 
         [OneTimeSetUp]
@@ -75,20 +74,21 @@ public void TestWritingAndReadingBackFromGeometryTable(string wkt)
             using var connection = OracleHelper.OpenConnection(_connectionString);
 
             // Make a new table.v
-            string res = OracleHelper.CreateGeometryTable(connection, testTableName);
+            string tableName = $"tbl_{Guid.NewGuid()}".Replace('-', '_');
+            string res = OracleHelper.CreateGeometryTable(connection, tableName);
             // TODO this is pretty dumb, need to check exact output
             Assert.That(!string.IsNullOrWhiteSpace(res));
 
             // Write current geometry to table.
-            var geom = OracleHelper.WriteGeometryToTable(connection, wkt, testTableName);
+            var geom = OracleHelper.WriteGeometryToTable(connection, wkt, tableName);
 
             // Read current geometry from table.
-            var geom2 = OracleHelper.ReadGeometryFromTable(connection, testTableName);
+            var geom2 = OracleHelper.ReadGeometryFromTable(connection, tableName);
 
             Assert.That(geom.EqualsExact(geom2));
 
             // Drop Geometry table
-            OracleHelper.DropGeometryTable(connection, testTableName);
+            OracleHelper.DropGeometryTable(connection, tableName);
         }
     }
 }

test/NetTopologySuite.IO.Oracle.Test/OracleHelper.cs

@@ -48,7 +48,7 @@ public static string CreateGeometryTable(OracleConnection connection, string tab
         {
             DropGeometryTable(connection, tableName);
 
-            string queryString = $"CREATE TABLE {tableName} (data MSYS.SDO_GEOMETRY)";
+            string queryString = $"CREATE TABLE \"{tableName}\" (data MSYS.SDO_GEOMETRY)";
             using var command = new OracleCommand(queryString, connection);
             command.ExecuteNonQuery();
 
@@ -66,7 +66,7 @@ public static void DropGeometryTable(OracleConnection connection, string tableNa
         {
             // Remove 'GEO_DATA' table
             string queryString = $@"BEGIN
-                EXECUTE IMMEDIATE 'DROP TABLE {tableName}';
+                EXECUTE IMMEDIATE 'DROP TABLE ""{tableName}""';
                 EXCEPTION
                     WHEN OTHERS THEN
                         IF SQLCODE != -942 THEN
@@ -94,7 +94,7 @@ public static Geometries.Geometry WriteGeometryToTable(OracleConnection connecti
             // Drop & Create Geometry table.
             CreateGeometryTable(connection, testTableName);
 
-            string queryString = $"INSERT INTO {testTableName} (data) VALUES (:geo)";
+            string queryString = $"INSERT INTO \"{testTableName}\" (data) VALUES (:geo)";
 
             using var command = new OracleCommand(queryString, connection);
             var geometryParam = new OracleParameter()
@@ -142,7 +142,7 @@ public static Geometries.Geometry ReadGeometryFromTable(OracleConnection connect
             if (wasClosed) connection.Open();
 
             // Write query string & command
-            string queryString = $"SELECT * FROM {testTableName}";
+            string queryString = $"SELECT * FROM \"{testTableName}\"";
             using var command = new OracleCommand(queryString, connection);
 
             var geometryParam = new OracleParameter();